MathSciNet bibliographic data MR1802725 (2001i:20083) 20F65 (57M07 57M60 57S30) Swenson, Eric L. A cut point theorem for ${\rm CAT}(0)$${\rm CAT}(0)$ groups. J. Differential Geom. 53 (1999), no. 2, 327–358. Article

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